Posted by Jasmine on Tuesday, May 18, 2010 at 10:17pm.
I need help with finding the amplitude, period, and the interval.
y=43cos(xpi)

trig  drwls, Tuesday, May 18, 2010 at 11:31pm
The amplitude is 3.
The x interval between maxima is 2 pi.
It makes no sense to talk about a time period, since there is no t in the equation. Did you leave it out by mistake?